Question

Dentro do conjunto universo Q, resolva as equações do 1º grau:
a) 4.(x – 2) – 5.(2 – 3x) = 4.(2x – 6)
b) 3 – 2 (x + 3) = x – 18
c) 50 + (3x − 4) = 2 (3x – 4) + 26

Answer 1

Resposta:

a)

$4(x-2)-5(2-3x)=4(2x-6)\\\\4x-8-10+15x=8x-24\\\\4x+15x-8x=-24+8+10\\\\11x=-6\\\\x=-\frac{6}{11}\\\\x=-0,545454...$

b)

$3-2(x+3)=x-18\\\\3-2x-6=x-18\\\\-2x+x=-18-3+6\\\\-x=-15\\\\x=15$

c)

$50+(3x-4)=2(3x-4)+26\\\\50+3x-4=6x-8+26\\\\3x-6x=-8+26-50+4\\\\-3x=-28\\\\-x=-\frac{28}{3} \\\\x=9,333...$